Photographic diffuser



FIG. 1 is a front perspective view of the photographic diffuser;

FIG. 2 is a front elevational view of the photographic diffuser;

FIG. 3 is a left side elevational view of the photographic diffuser with the right side being a mirror image;

FIG. 4 is a rear elevational view of the photographic diffuser;

FIG. 5 is a top plan view of the photographic diffuser; and,

FIG. 6 is a bottom plan view of the photographic diffuser. 

The ornamental design for a photographic diffuser, as shown and described. 